CVE-2025-27920

high

Description

Output Messenger before 2.0.63 was vulnerable to a directory traversal attack through improper file path handling. By using ../ sequences in parameters, attackers could access sensitive files outside the intended directory, potentially leading to configuration leakage or arbitrary file access.

References

https://www.microsoft.com/en-us/security/blog/2025/05/12/marbled-dust-leverages-zero-day-in-output-messenger-for-regional-espionage/

https://securityaffairs.com/178140/security/u-s-cisa-adds-ivanti-epmm-mdaemon-email-server-srimax-output-messenger-zimbra-collaboration-and-zkteco-biotime-flaws-to-its-known-exploited-vulnerabilities-catalog.html

https://www.cisa.gov/news-events/alerts/2025/05/19/cisa-adds-six-known-exploited-vulnerabilities-catalog

https://www.darkreading.com/cyberattacks-data-breaches/turkish-apt-exploits-chat-app-zero-day-spy-iraqi-kurds

https://www.theregister.com/2025/05/13/turkish_spies_messaging_app/

https://www.securityweek.com/output-messenger-zero-day-exploited-by-turkish-hackers-for-iraq-spying/

https://www.infosecurity-magazine.com/news/turkey-hackers-iraq-kurds-zero-day/

https://thehackernews.com/2025/05/turkiye-hackers-exploited-output.html

https://securityaffairs.com/177758/apt/apt-group-exploited-output-messenger-zero-day-to-target-kurdish-military-operating-in-iraq.html

https://www.bleepingcomputer.com/news/security/output-messenger-flaw-exploited-as-zero-day-in-espionage-attacks/

https://www.srimax.com/products-2/output-messenger/

https://www.outputmessenger.com/cve-2025-27920/

Details

Source: Mitre, NVD

Published: 2025-05-05

Updated: 2025-08-27

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.60724